<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>设备利旧管理系统</title>
    <style>
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: #F5F5F7;
            margin: 0;
            padding: 0;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        .header {
            text-align: center;
            margin: 40px 0;
        }
        .header h1 {
            font-size: 28px;
            font-weight: bold;
            color: #000;
        }
        .button-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin: 30px 0;
        }
        .btn {
            width: 200px;
            height: 100px;
            border-radius: 12px;
            border: none;
            color: white;
            font-size: 18px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
        }
        .btn:hover {
            opacity: 0.9;
            transform: scale(1.03);
        }
        .btn-inbound { background-color: #34C759; }
        .btn-outbound { background-color: #0A84FF; }
        .btn-discard { background-color: #FF9500; }
        .btn-stats { background-color: #AF52DE; }
    </style>
</head>
<body>
    <div class="container">
        <div class="header">
            <h1>设备利旧管理系统</h1>
        </div>
        <div class="button-container">
            <button class="btn btn-inbound" onclick="location.href='/inbound'">入库</button>
            <button class="btn btn-outbound" onclick="location.href='/outbound'">出库</button>
            <button class="btn btn-discard" onclick="location.href='/discard'">销库</button>
            <button class="btn btn-stats" onclick="location.href='/stats'">统计</button>
        </div>
    </div>
</body>
</html>